Tyr, although you probably know this already, there is a "saved" status at the top right on the debug menu, usually it'll take a save (sending location, backpack info etc) to the hive where it is stored, it is possible that this was "false" when you logged out, meaning when you logged in again it reverted to the last "true" save point, there is talk about "hard" saving but i dont know as of yet if this is possible :/